Slate-shaving machine



\NO Model.)

H. & E. KUR'TZ; SLATE SHAVING MACHINE.

No. 484,802. Patented Oct. 25,1892;

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slate at the same time.

I UNITED STATES PATENT OFFICE.

HENRY. KURTZ AND EPHRAIM KURTZ, OF BANGOR, PENNSYLVANIA.

SLATE-S'HAVING MACHINE.

SPECIFICATION forming part of Letters Patent No. 484,802, dated October25, 1892. Application filed May 28.1892. Serial N0.434,306. (N0 model)To all whom it may concern:

Be it known that we, HENRY KURTZ and EPHRAnn KURTZ, citizens of theUnited States, residing at Bangor, i-n-the county of Northampton andState of Pennsylvania,-have invented certain new and useful Improvementsin Slate-Shaving Machines; and we do hereby declare that the followingis a full, clear, and exact description of the same, reference being hadto the annexed drawings, making a part of this specification, and to theletters of refer ence marked thereon.

This invention relates to certain new and useful improvements inslateshaving machines; and it has for its objects, among others, toprovide an improved machine of this class in which a crooked slate canbe handled and shaved as well-as a straight oneandin which the slatewill be brought down in line upon the bed and'there held while beingshaved. We provide a bed which moves with the knives. The machine is ahorizontal one in which the knives move back and forth and shave a slateat each reciprocation,the knives being arranged to act upon both sidesof the We provide a stationary beveled breast, against which the slateis held while being acted upon. This breast serves to bring the slatedown in line upon the bed before it is acted upon by the knives. We alsoprovide improved means for holding the knives to their bed.

Other objects and advantages of the invention will hereinafter appear,and the novel features thereof will be specifically defined by theappended claims.

The invention is clearly illustrated in the accompanying drawings,which, with the letters of reference marked thereon, form a part of thisspecification, and in which-- Figure 1 is a plan View of one-half of ourimproved slate-shaving machine. Fig. 2 is a vertical longitudinalsection through the line 2 2 of Fig. 1. Fig. 3 is a detail showing themanner of holding the knives in place.

Like letters of reference indicate like parts throughout the severalviews in which they appear.

Referring now to the details of the drawings by letter, A designates theframework or support for the operating parts.

B is a shaft suitably journaled in proper position and to which motionis to be imparted from any suitable source of power. There may bearranged one, two, or more sets of supporting-beds and sets of knives.We have shown but one, as that is considered sufficient to demonstratethe construction and operation of our invention; but it will beunderstood that we do not restrict ourselves to but one set, as where itis desired to shave several slates at the same time the'desired numberof devices may be arranged to be operated from the same shaft. We haveshown upon one end of this shaft B a crank-arm G, to the pin a of whichis pivotally connected in any suitable manner the pitman D, the otherend of which is sleeved upon the cross-rod b of the knife-carrier, asshown in Figs. 1 and 2. The carrier E is mounted to reciprocate betweenthe longitudinal timbers of the framework and has upon opposite sidesthe lugs c, which are designed to work in the guides e, which aresuitably mounted upon the said longitudinal timbers of the frame, asseen in Figs. 1 and 2. At opposite ends of the carrier we aifix thereversely-inclined knife-beds E, which are suitably affixed to thecarrier and upon the outer faces of which the knives are detachablyarranged. The knives F, which may be of any desired construction, arearranged to slide in guides formed between the beds E and the parallelbars (1 on the sides of the carrier, as seen best in Fig. 2, and theyare held in their proper position by the cam-head G, which is carried bythe lever H, fulcrumed on the lug f, as seen best in Fig. 3, andarranged to bear upon the outer face of the knife and press it to itsbed. This lever carries an arm g at right angles to the length of thelever and which is designed to extend over the outer edge of the knife,being provided with a rightangled part h, through which passes asetscrew 't, which may be set up against the outer edge of the knife andprevent its outward movement. When these levers are thrown up, theknives can be adjusted or removed. When thrown down, they hold theknives in their adjusted positions.

Between the knives is arranged a bed I for the support of the slate andwhich moves with the carrier. It is formed of slats set on edge asuitable distance apart to allow the slate renliloved by the knives tofall through between t em.

4 J is the breast, where the slate K rests when being acted upon. It issecured transversely of the machine at the center of the positionoccupied by the knives when at their normal location. It is oppositelybeveled upon opposite sides, as seen best in Fig. 2, and is notched, asseen at j, for the reception of the independently-adjustablepressure-pins 70 upon the top and the slats of the slate-bed upon theunder side.

The operation will be readily understood. The slate 'K is placed uponthe bed I, and its ends will be held bythe beveled edge of the breastand the pressure-pins on the knife-bed. It the slate be a crooked one,when the knives lnoveup toward the slate and the inclined pressure-pinsstrike the slate they will bring the same down in line upon the bed, andit will be held there while being shaved by the knives, which act uponboth sides thereof, as will be readily seen from Fig. 2. The knives canbe adjusted to cut more or less, as may be desired. Any suitablemeans-as setscrews w-may be provided for adjusting the pressure-fingersrelative to the work.

Modifications in details maybe resorted to without departing from thespirit of the invention or sacrificing any of its advantages.

What we claim as new is- 1. The combination,with the reciprocating bedwith its knives and slatted bed and independently-adjustablepressure-pins, of atransverse bar having its edges beveled, asand for the purpose specified.

2. The combination,with the reciprocating carrier with its knives andbed and independently adjustable inclined pins, of inclined guides onthe knife-bed and a transverse bar having beveled edges, as and for thepurpose specified.

3. The combination,with the reciprocating carrier with its knives andindependently-ad justable inclined pressure-pins, of the transverse barfixed between the knives and having its edges beveled and notched, asshown and described.

4.'The combination, with the carrier provided with knife-bed, knife, andguide, of the lever having cam portion and an arm at right anglesthereto and provided with right-angled portion with set-scr.ew, as andfor the purpose specified.

5; The combination, with the frame, of the carrier and itsoperatingmeans, a transverse beveled bar, oppositely-arranged knives on thecarrier to act upon both sides of a slate, a

slatted bed between the knives, and inclined independently adjustablepressure pins on the knife-bed, as and for the purpose specified.

In testimony that we claim the above we have hereunto subscribed ournames in the presence of two witnesses.

HENRY KURTZ. EPHRAIM KURTZ.

Witnesses;

' DAVID H. SEEM,

WM. A. J QHNSON.

